3/4=7/x-9

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Solution for 3/4=7/x-9 equation: 


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

3/4 = 7/x-9 // - 7/x-9

3/4-(7/x)+9 = 0

3/4-7*x^-1+9 = 0

-7*x^-1 = -39/4 // : -7

x^-1 = 39/28

-1 < 0

1/(x^1) = 39/28 // * x^1

1 = 39/28*x^1 // : 39/28

28/39 = x^1

x = 28/39

x = 28/39

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